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Everything you do and all of the functions of your body use energy. Our only source of energy is the food we eat. Most people use
between 1500 and 2500 calories (units of energy) per day.
Your body can use protein, carbohydrates or fats from your food for energy. If the food you eat contains more calories than you burn, you store
the excess as fat. Any time you eat fewer calories than you need for your daily activities, your body uses your stored fat for energy.
If you find yourself gaining weight every year, you are probably taking in more calories than you burn. It's hard to get all of the nutrients your body needs with fewer than 1500 calories per day, even if you eliminate all of the "empty calorie" junk foods (refined carbohydrates and bad fats). Usually it's easier -- and much more healthful -- to increase your activity level than to restrict food. Find a sport you love (dancing, cycling, swimming, rowing or any other continuous activity) and make it part of your life. If you're not already exercising, read How to Start an Exercise Program. You'll find lots of exercise tips in the Fitness section of  For long-term weight loss and weight control, I recommend intermittent fasting.

FAT=9 calories per gram
=4 calories per gram
=4 calories per gram

July 26th, 2013
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About the Author: Gabe Mirkin, MD

Sports medicine doctor, fitness guru and long-time radio host Gabe Mirkin, M.D., brings you news and tips for your healthful lifestyle. A practicing physician for more than 50 years and a radio talk show host for 25 years, Dr. Mirkin is a graduate of Harvard University and Baylor University College of Medicine. He is board-certified in four specialties: Sports Medicine, Allergy and Immunology, Pediatrics and Pediatric Immunology. The Dr. Mirkin Show, his call-in show on fitness and health, was syndicated in more than 120 cities. Read More
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